Sony's VAIO Z-Series comprises some of the only sub-2kg laptops to currently feature Intel's Core i7 technology and are among the best ultraportable laptops you can buy. While the price is high, the VAIO VPC-Z12V9E/X continues this tradition. Due to the high-powered performance of Core i7 processors and the subsequent cooling they require, it is rare to find them inside such a slim laptop. As a result, some rivals have used low-voltage variants of the Core i7 range to reduce heat output.



Link: Techradar